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/*
* Copyright 2016 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Christian König
*/
#ifndef __AMDGPU_VM_INTERNAL_H__
#define __AMDGPU_VM_INTERNAL_H__
#include <linux/types.h>
#include <linux/list.h>
#include "amdgpu_vm.h"
struct amdgpu_device;
struct amdgpu_vm;
struct amdgpu_job;
struct amdgpu_sync;
struct amdgpu_bo_vm;
struct amdgpu_vm_bo_base;
struct dma_fence;
/**
* struct amdgpu_vm_update_params
*
* Encapsulate some VM table update parameters to reduce
* the number of function parameters
*
*/
struct amdgpu_vm_update_params {
/**
* @adev: amdgpu device we do this update for
*/
struct amdgpu_device *adev;
/**
* @vm: amdgpu_vm we do this update for
*/
struct amdgpu_vm *vm;
/**
* @immediate: if changes should be made immediately
*/
bool immediate;
/**
* @unlocked: true if the root BO is not locked
*/
bool unlocked;
/**
* @pages_addr:
*
* DMA addresses to use for mapping
*/
dma_addr_t *pages_addr;
/**
* @job: job to used for hw submission
*/
struct amdgpu_job *job;
/**
* @num_dw_left: number of dw left for the IB
*/
unsigned int num_dw_left;
/**
* @needs_flush: true whenever we need to invalidate the TLB
*/
bool needs_flush;
/**
* @override_pte: true for memory that is not uncached and gmc override function is
* implemented to allow MTYPE to be overridden for NUMA local memory.
*/
bool override_pte;
/**
* @saved_flags: Saved flags for GFP reduction.
*/
unsigned int saved_flags;
/**
* @tlb_flush_waitlist: temporary storage for BOs until tlb_flush
*/
struct list_head tlb_flush_waitlist;
};
struct amdgpu_vm_update_funcs {
int (*map_table)(struct amdgpu_bo_vm *bo);
int (*prepare)(struct amdgpu_vm_update_params *p,
struct amdgpu_sync *sync, u64 k_job_id);
int (*update)(struct amdgpu_vm_update_params *p,
struct amdgpu_bo_vm *bo, uint64_t pe, uint64_t addr,
unsigned count, uint32_t incr, uint64_t flags);
int (*commit)(struct amdgpu_vm_update_params *p,
struct dma_fence **fence);
};
int amdgpu_vm_pt_clear(struct amdgpu_device *adev, struct amdgpu_vm *vm,
struct amdgpu_bo_vm *vmbo, bool immediate);
int amdgpu_vm_pt_create(struct amdgpu_device *adev, struct amdgpu_vm *vm,
int level, bool immediate, struct amdgpu_bo_vm **vmbo,
int32_t xcp_id);
void amdgpu_vm_pt_free_root(struct amdgpu_device *adev, struct amdgpu_vm *vm);
int amdgpu_vm_pde_update(struct amdgpu_vm_update_params *params,
struct amdgpu_vm_bo_base *entry);
int amdgpu_vm_ptes_update(struct amdgpu_vm_update_params *params,
uint64_t start, uint64_t end,
uint64_t dst, uint64_t flags);
void amdgpu_vm_pt_free_work(struct work_struct *work);
void amdgpu_vm_pt_free_list(struct amdgpu_device *adev,
struct amdgpu_vm_update_params *params);
int amdgpu_vm_pt_map_tables(struct amdgpu_device *adev, struct amdgpu_vm *vm);
/**
* amdgpu_vm_begin_critical - start the critical section of the update
* @p: The update parameters
*
* Serialize all updates, check parameters and make sure that memory allocations
* don't enter the reclaim path so that we don't deadlock with MMU notifiers.
*
* Returns:
*
* 0 on success or a negative error code on failure.
* Even on error amdgpu_vm_end_critical() must still be called to clean up!
*/
static inline int amdgpu_vm_begin_critical(struct amdgpu_vm_update_params *p)
{
mutex_lock(&p->vm->eviction_lock);
p->saved_flags = memalloc_noreclaim_save();
if (p->vm->evicting)
return -EBUSY;
return 0;
}
/**
* amdgpu_vm_end_critical - end the critical section of the update
* @p: The update parameters
*
* Restore the GFP flags and drop the lock.
*/
static inline void amdgpu_vm_end_critical(struct amdgpu_vm_update_params *p)
{
memalloc_noreclaim_restore(p->saved_flags);
mutex_unlock(&p->vm->eviction_lock);
}
#endif
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